Suits to any hardness water up to 3000ppm -Technologicaly advanced storage tank with Daimond Glass Line coating -High efficient PUF insulation -High quality ETC tube used in the system which can generate high temprature of hot water between 70-90*c on clear sunny days High quality solar selective coating facility excellent heat absorption and minimal heat loss -support structure made out of GI sheet with polyster based powder coating -10 Years guarantee for DGL Model hot water storage tank -250DGL Model SWH SYS comes with 250Ltr Hot water storage tank,25Nos ETC glass tubes,tank mounting structure with all accessories